Healthy saliva: 20% oxygen. Bad breath:only 2%
Baby’s breath: pure, fresh, alive. Modern life disrupts that natural harmony. Cleaning products mask. Rainbow Smile supports oxygen-rich freshness.
Minty Fusion
Pure Cleanse
Zesty Cinnamon
This is Biome Food™
Regenerative Organic Coconut Glycerin, a plant‑based humectant that locks in lasting freshness all day.*
“4th Phase Structured Hydration delivers up to 10X deeper moisture support for healthy, resilient oral tissues.”
BiomeFood™ Oxygen Nano-bubbles 15X more bio-available.*
Bio-field Resonance Sustains Oxygen and Promotes balanced oral-gut signaling.*
Two Forms of Oxygen.
Bio-available life-supporting (feeds good microbes) and life-damaging (peroxide) Biome Food™ delivers the Oxygen that Powers all life on Earth.
Hack Your Mouth, Upgrade Your Life
Free eBook download:
The Biome Hacker's Handbook
By William Robertson, Founder of Rainbow Smile
Foreword by Dr. Vanita K. Gupta, PhD, MBA
How to Use
Rainbow Smile comes in a Miron glass pump bottle with a travel cap, easy to use, safe to carry, and gentle for daily use.
For a gentle oral ecology reset, use Rainbow Smile under the tongue.
- 1–2 pumps under the tongue
- Hold for 60 seconds, then swallow
- Morning and night
- After a meal
- Before intimacy
- Before a close conversation
- Anytime social
One bottle = up to 1 month supply
Add Rainbow Smile to your regular brushing routine for daily oxygen rich freshness:
- Add 1–2 pumps on top of your toothpaste
- Brush for 2 minutes
- Use every time you brush
- Or use on brush without toothpaste
One bottle = up to 1 month supply
- Massage 1–2 pumps directly into gums and sensitive areas
- Add 1–2 pumps into a water flosser / WaterPik for extended reach.
KISS FRIENDLY
Supports fresher breath for confident moments.*
BEFORE BED
Promotes all-night and morning oral freshness.*
DAILY RITUAL
Supports confident close conversations.*
BIOME HACK
Gentle daily oral wellness support.*
Your mouth Is Alive
The mouth is your control panel programming your energy, immunity, and vitality through 1,000+ swallows a day. Healthy microbes and tissues thrive on bio-available oxygen; the troublemaking ones avoid it. Rainbow Smile OG3™ delivers oxygen + hydration so healthy life can thrive. Bottled in ultra-violet Miron glass for potency.
Oral care is gut care. Gut care is self care.
The Microbiome Smile, The Complete Book
Unlocking the Oral–Gut Axis for Whole-Body Wellness
99% of our body is run by our Microbial OS.
Dive into this fun‑to‑read, 200‑page story that fuses science, biome‑wise technology, and storytelling to unveil the living world inside your mouth, a hidden ecosystem that echoes through your entire body. Learn how oxygen, balance, and natural care bring harmony back to one of the body’s most intelligent systems: your smile.
About the Founder
Hi, I’m William Robertson,
Founder of Rainbow Smile — a company born from a deep passion for wellness, the wisdom of nature, and the belief that true health begins within the small but mighty ecosystem living inside each of us.
Rainbow Smile is more than just a line of products — it’s a movement. A movement toward reconnecting with nature, reclaiming vibrant, whole-body health, and embracing joy-filled, authentic smiles as symbols of genuine wellness.
Giving Back
Rainbow Smile is proud to partner with Springboard Connectivity, led by director Tracy Tarlow, to donate free oral care products to villagers in Kenya. Through this collaboration, we aim to support the health and well-being of underserved communities by providing access to our organic, microbiome-friendly oral products. This initiative represents our commitment to global wellness and sustainable impact—bringing balanced oral health and bright smiles to those who need it most.